Philosophy of design for low cost and high reliability

John Leif Jørgensen, Carl Christian Liebe

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    The Ørsted Star Imager or Advanced Stellar Compass (ASC), includes the full functionallity of a traditional star tracker plus autonomy, i.e. it is able to quickly and autonomously solve "the lost in space" attitude problem, and determine its attitude with high precision. The design also provides robust error rejection and fault recovery, as well as graceful radiation induced, false object and thermal load degradation. The instrument was developed from concept to flight model within 3 years. The instrument surpasses the initial specifications for all design parameters. For Precision, Computational speed and Fault detection and recovery substantially. The high performance and low cost design was realized by the use of advanced high level integrated chips, along with a design philosophy of maximum autonomy at all levels. This approach necessitated the use of a prototyping facility which could do extensive component testing and screening which addressed the issues of reliability, thermo-mechanical properties, and radiation sensitivity of the commercial IC's. The facility helped to control costs by generating early information on component survival in space. The development philosophy and process are described, starting with the system specifications and its derived design drivers, through the design process and its iterations, including the specification, design and capability of the prototyping facility, and ending with the final system design. The rationale for IC-level selection and system flexibility are addressed.KEY WORDS: Micro satellite, stellar compass, star tracker, attitude determination.
    Original languageEnglish
    Title of host publicationProceedings SPIE volume 2810
    Place of PublicationDenver
    Publication date1996
    Publication statusPublished - 1996
    EventSPIE 1996 International Symposium on Optical Science, Engineering and Instrumentation - Denver, United States
    Duration: 4 Aug 19969 Aug 1996


    ConferenceSPIE 1996 International Symposium on Optical Science, Engineering and Instrumentation
    CountryUnited States
    OtherPresented at the Society of Photo-Optical Instrumentation Engineers. Proc. volume 2807+2810

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